Apparatus for coating containers.



P. J.4 MAGNISH. APPARATUS POR UOATIN G CONTAINERS.

APPLICATION FILED BBPT. 12, 1908.

Patented Mar. 2, 1909.

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UNITED sTATEs PATENT eEEreE.

FREDERICK J. MACNISI-I, OF OAK PARK, ILLINOIS, ASSIGNOR TO CREAMERY PACKAGE MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

APPARATUS FOR COATING CONTAINERS.

Specification of Letters Patent.

Patented March 2, 1909.

Application filed September 12, 1908. Serial No. 452,722.

To all whom it may concern:

Be it known that I, FREDERICK J. MAC- NIsH, a citizen of the United States, residing at Oak Park, vin the county of Cook and State of Illinois, have invented certain new and useful LImprovements in Ap aratus for Coating Containers, of which the ollowing is a specification.

VIt is desirable to apply a coat of paraffin to the interiors of tubs and other packages in whichbutter is packed, in order to prevent lossv of butter or injury thereto through absorption by or contact with the walls of the container.

The object of this invention is to provide simple, conveniently operated means for rapidly and thoroughly coating the interiors of butter tubs and other containers with paraffin or other material suitable to pro tect the contents of the container.

In the accompanying drawings, Figure 1 is a vertical central section through a machine embodying the features of my invention, the sup orting frame work or stand being omitted). Figs. 2 and 3 are transversesections on lines 2 2 and 3 3, respectively, of Fig. 1. Fig. 4 is a top plan view of a revoluble spraying head. Fig. 5 is a sectional detail of a relief valve. Fig. 6 is a transverse section through the stem of the relief valve. Fig. 7 is a fragmental top plan view yof the tub-supporting member.

The embodiment which I have selected for the purpose of illustrating my invention comprises a casing or shell 1 having therein a chamber 2 to receive a quantity of paraflin wax or other coating material, and a chamber 3 to contain the melted material. The chamber 2, as herein shown, is arranged directly above the chamber 3, both being surrounded by a space or jacket 4 for steam or other heating fluid, which space is rovided between the side walls of said cham ers and the easing or shell 1. The lower end of the melting chamber 2 communicates with the paraflin chamber 3 by means of ports 5 and 6 and a connecting cavity or recess 7. The port 5 is arranged to be closed by a valve 8. A suitable heating fluid, such as steam, may be admitted to the jacket 4 through a pipe 9. Said steam space or jacket mi be placed in communication with the para'lhn chamber 3 through a port 10, which ort is controlled by a valve 11 attached to t e end of a valve rod 12 slidably mounted in a stufling box 13. The outer end of the valve rod 12 has a pin and slot connection with a hand lever 14, which is pivotally mounted at 15 upon the casing 1. The fluid ressure within the space 4 tends to hold tie valve member 11 seated.

In the present embodiment, the tub or other container to be coated is arranged to be supported in an inverted position in a shallow pan 16 which is preferably removably mounted upon and forms a cover for the upper end of the easing 1. Heating lluid for heating the interior of the inverted tub is admitted to the space inclosed by said tub through a tube 17 extending from the jacket 4 to a point within said space, the upper end of said pipe being provided with a discharge nozzle or s raying head 18. The entrance of heating luid to the tube 17 is controlled by means of a valve member 19 adapted to be seated upon a valve seat surrounding the lower end of said tube. Steam pressure tends to hold the valve 19 seated. The stem 2O of the valve 19 extends through a stuffing box 21. A hand lever 22 has a pin and slot connection` with the valve stem 20, said hand lever being pivoted to the casing 1 at 15.

The melted paraflin is admitted to the interior of the tub through a passage-Way 23, extending from a point near the bottom of the paraffin chamber 3 to the space inclosed by the tub. In this instance, the passageway 23 is formed by a tube cast integral with the ehambered structure and a pipe connected to the upper end of said tube. Upon the upper end of said pipe is rotatably mounted a spraying head 24 (Figs. 1 and 4) comprising one or more arms which are provided in one side and on top with outlet openings, whereby said head is arranged to be rotated by the pressure of the parallin discharged from it. The openings in the head 24 are so arranged that in the rotation of said head the para'llin will be sprayed upon every part of the interior of the tub.

Fluid pressure admitted tl'rrough the port 10 to the chamber 3 above the level of the melted paraffin therein will force paraffin upward through the passage-way 23 and out r mi:

through the spraying head 24. The discharge through said spraying head continues as long as the port 10 is open, and would continue for some time after said port was closed, by reason of the pressure fluid trapped in the chamber 3, unless means were provided to prevent such result. 1n order therefore that the spraying action may be instantly suspended at the will of the operator l provide means for relieving the pressure in the chamber 3. Preferably said pressure-relieving means is automatically operated upon the closing of the port 10. 25 (Fig. 5) is a relief valve connected with the paraffin chamber 3 through a passage 26. A valve member 27 has a stem 28 slidable in a tubular guide 29, said stem being non-circular in cross-section, whereby an outlet for pressure fluid is provided between said stem and its guide. lil/*hen in the position shown in full lines in Fig. 5, the valve member 27 closes communication between the port 26 and the tubular guide and outlet 29. Vfhen raised, as indicated in dotted lines in said figure, the pressure fluid trapped in the chamber 3 by the seating of the valve 11 escapes from said chamber through the outlet 29. The valve member 27, as herein shown, is operated by means comprising a bell-crank 30, one arm of which underlies the valve stem 28, the other arm being arranged to be moved by one end of the hand lever 14 (Figs. 2 and 5). If desired, the hand lever 14 may bear against an adjusting screw 31 carried by said bell crank. A gage Y 32 may, if desired, be provided for observing the heig'ht of any condensation or other liquid in the jacket 4. A gage 33 also may be used to note the height of the paraffin in the chamber 3. 34 and 35 are drain cocks for the parafiin chamber 3 and the jacket 4, respectively.

rlhe excess paraffin sprayed into the tub may be returned to the chamber 2 by any suitable means, such as a port 36 extending from the lowest portion of the pan 16 to said chamber. When it is desired to drain the eXcess paraffin to a point outside the machine, a port 37 may be opened by removing a screw plug 38, and said plug screwed into the port 36.

39 (Fig. 7) is an opening in the pan 16, through which paraffin may be introduced into the melting chamber 2. The opening 39 is normally closed by a cover 40.

l have omitted to illustrate a frame or stand for supporting the casing 1 and attached parts, as any suitable form of support may be employed.

1n preparing the apparatus for use, the cover 40 is removed, a quantity of paraffin wax placed in the chamber 2, and said cover replaced. Steam is then admitted to the jacket 4 through the pipe 9, melting the paraffin. rlhe valve 8 is then opened to permit the melted paraffin to flow into the chamber 3 through the port 5, after which said valve is closed. The container to be coated having been set upon the pan 16 in an inverted position, the hand lever 22 is operated to admit heating fluid to the space inclosed by the container, whereby the inner walls of said container are heated. rllhe flouT of heating fluid through the pipe 17 having been cut off, the hand lever 14 is operated to introduce pressure fluid through the port 10 into the paraffin chamber 3 above the level of the paraffin, the liquid parafiin being forced upward through the passage-way 23 and'through the spraying head 24. 1n the rotation of said head, all portions of the interior walls of the container are thoroughly sprayed. Said Walls being warm, only a thin film of paraffin adheres to the tub, the remainder flowing into the pan 16, whence it finds its way to the chamber 2 through the port 36. From time to time the paraffin accumulating 1n the chamber 2 may be returned to the chamber 3 by operating the valve 3. As soon as the port 10 is closed by the operator, the pressure in the chamber 3 is relieved through the valve 25, thus promptly arresting the spraying action. ilf'hen the hand lever 14 is swung to seat the valve 11 the rear end of said lever tilts the bell-crank 30 and opens the relief valve 25. The tub may now be lifted from the pan 16 and another tub placed thereon, to be heated and coated as just described.

While 1 have described my invention in connection with an apparatus for paraffining butter tubs, it is obvious that it may be embodied in machines for coating various other forms of containers with any suitable protective material.

l wish it to be understood that 1 desire not to limit myself to the details of construction herein illustrated and described, for many modifications will occur to those skilled in the art.

1 claim as my invention:

1. 1n an apparatus for coating containers, in combination, a container for a coating material, a discharge means connected with said container, means for admitting pressure fluid to said container, and means for relieving the fluid pressure in said container.

2. In an apparatus for coating containers, in combination, a container for a coating material, a discharge means connected with said container, means for conducting pressure fluid to said container, means controlling the last mentioned means and a pressurerelieving means operated by said controlling means. i

3. In an apparatus for coating containers, in combination, a container for a coating material, a discharge means connected with said container, a valved communication between said container and a source of pressure fluid, and a relief valve for said container.

4. In an apparatus for coating containers, in combination, a container for a coating material, a discharge means connected with said container, a pressure-cut-oil' valve for said container, an operating lever connected with said valve, and a relief valve for said container arranged to be operated by said lever.

5. In an apparatus for coating containers, in combination, a container for a coating material, a discharge means connected with said container, a pressure-cut-oif valve for said container, a pivoted operating lever connected at one side of its pivot with said valve, and a relief valve for said container, operatively connected with said lever at the other side of its pivot.

6. In an apparatus for coating containers, in combination, a container for a coating material, a discharge means connected with said container, a pressure-cut-off valve and a relief valve for said container, and a single means for operating both of said valves.

7. In an apparatus for coating containers, in combination, a container for a coating material, a discharge means connected with said container, a pressure-cut-ofl valve and a relief valve for said container, and means for simultaneously operating said valves.

8. In an apparatus for coating containers,

in combination, a container for a coating material, and means for relieving pressure in said container comprising a valve, a bellcrank, one arm of which bell-crank is arranged to operate said valve, and a hand lever arranged to engage the other arm of said bell-crank.

9. In an apparatus for coating containers, in combination, two chambers; a valved communication between said chambers; a jacket surrounding said chambers, to contain a heating iiuid under pressure; a valved communication between said jacket and one of said chambers; an outlet for the last mentioned chamber; a distributing device connected with said outlet; and a discharge means for heating fluid in valved communication with said jacket.

10. In an apparatus for coating containers, in combination, a melting chamber, a chamber for the melted material, a jacket surrounding said chambers to contain a heating fluid under pressure, a valved communication between said chambers, an outlet for the second mentioned chamber, and a valved communication between the last mentioned chamber' and said jacket.

11. In an apparatus for coating containers, in combination, a chamber; a jacket surrounding said chamber, to contain a heating fluid under pressure; a valved communication between said chamber and said jacket; a support for a container; and an outlet for said chamber extending into operative proximity to said support.

12. In an apparatus for coating containers, in combination, a rece )tacle for the coating material, a conductor eading from said receptacle to the place of discharge; means for forcing material from said receptacle into and through said conductor; and means for promptly arresting the discharge from said conductor, said conductor being arranged to return to said receptacle the material not discharged from said conductor.

13. In an apparatus for coating containers, in combination, a chamber; a jacket surrounding said chamber, to contain a heating iiuid under pressure; a valved communication between said chamber and said jacket; a support for an inverted container; and an outlet means extending from the lower part of said chamber directly upward into the space inclosed by said container.

14. In an apparatus for coating containers, in combination, a chamber; a jacket surrounding said chamber, to contain a heating iiuid under pressure; a valved communication between said chamber and said jacket; a support for an inverted container; an outlet means extending from the lower part of said chamber directly upward into the space inclosed by said container; and a discharge means for heating fluid in valved communication with said jacket.

15. In an apparatus for coating containers, a structure containing a reservoir for a heating fluid under pressure and a reservoir for a coating iluid, one of said reservoirs surrounding the other reservoir, an outlet means for the coating fluid, means for placing said reservoirs in communication, and a containersupporting pan mounted upon the upper part of said structure.

16. In an apparatus for coating containers, in combination, a casing having therein a chamber to receive unmelted coating material and a chamber to contain the melted material, the iirst mentioned chamber being above the second mentioned chamber, said chambers being surrounded by a steam space; a valved communication between said chambers; a container-supporting pan mounted upon said casing; an outlet means extending from the lower part of the lower chamber, upward through said pan; and a valved communication between said lower chamber and said steam space. 1

17. In an apparatus for coating containers, in combination, a melting chamber; a chamber for the melted material below the other chamber a valved communication between said chambers; a steam jacket surrounding said chambers; a support above said chambers for an inverted container; an outlet heating ludn Valved communication With means extending from the lower part of the said jacket and extending into the space nsecond mentioned chamber directly upward i closed by said container.

into the space ncosed by said container; FREDERCK J. MACNSH.

a Valved communication between the upper Fw/'tnessesz part of the second mentioned chamber and E. D. HGGS,

said steam jacket; anda discharge means for J. H. GODFREY. 

